I took off Binx's "cone of shame." With the placement of her sores, she kept managing to get around it anyway. All the cone was doing was annoying her and keeping her from grooming near her shoulders.
At this point she likely has less than a week to live before the cancer reduces her quality of life below a decent threshold. (Her vet thinks she's already there, but there's still so much light in those eyes.) The sores won't heal by then.
I might as well let her be as comfortable as possible.